Change-speed gearing.



. PATBNTED JULY 30, 1907.

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WILLIAM M. POWER, OF PORT CHESTER, NEW YORK.

CHANGE-SPEED GEARING.

Speciicationpof Iletters Patent.

Patented July 30, 1907.

Appleman sied APIE 15,1905. serial No. 255,749.

To all whom it may concern:

Be it known that I, WILLIAM M. POWER, a citizen of the United States,and a resident of Port Chester', Westchester county, State of New York,have invented a certain new and useful Improvement in Change- SpeedGearing, of which the following is a specification. j

The object I have in vview is the production of a speed gearing suitablefor automobiles, whichfwill be extremely efficient, compact, light,simple and cheap to construct. I attain these objects by the mechanismillustrated in the accompanying drawings, in which,

. Figure l is a plan view of a gearing embodying my invention, shownpartly in section; and Fig.l 2 is a detail view of the clutch, slightlyenlarged, and also partly in section.

In both views like parts are designated by the same referencecharacters. I

The invention comprises a change speed gearing of the sliding gear type,in connection with a friction clutch, all being compactly groupedtogether, and all being arranged within the same dust proof, oilretaining casing.

The necessary moving parts of the sliding gear transmission mechanism,and the friction clutch will be lubricated by the same oil containedwithin the casing. The clutch will also be protected from dust, andaccident, and there will be no necessity of additional bearings betweenit and the gearing. The structure will therefore have a minimum oflength and weight. Another and very important point in connection withthis device is that the clutch is reduced to the smallest practicalsize, consequently its weight and the resulting inertia is reduced.

The practical objection to a clutch outside of the gear casing and ofthe customary size is that owing to its weight it possesses aconsiderable amount of inertia, which will have the result in shiftingfrom one speed to another of damaging and causing excessive wear uponthe edges of the teeth of the sliding gears. In my invention byemploying a small clutch such as shown and described, the inertia of theparts is reduced to the smallest possible amount, consequently whenshifting from one speed to another the teeth of the gears are caused toengage without undue shock and the amount of wear and damage is reducedto a minimum. This desirable result is facilitated by placing the clutchwithin the gear casing as by such construction the usual connectingshaft between the clutch and the gear is dispensed with and its weightand consequent inertia is done away with.

In carrying out my invention I provide a casing 1 within which both thechange speed gearing and the clutch are contained. This casing is dustproof and is liquid proof so thatit will carry the necessary amount oflubricating oil for the gears, the clutch and the shafts bearings. Inthe.drawings, 2 is the main shaft connected to the motor by means of thecoupling 3. This shaft is mounted in a bearing 4, at one end, and abushing shown in dotted lines, within a sleeve S, the latter beingmounted within a bearing 5, both bearings being carried by the casing.Surrounding the shaft is asleeve 6 separated therefrom by means of abushing 7 so that it will rotate upon the shaft withoutsubstantialfrictional loss. Upon the shaft 2 is a sleeve 8, carried upona secondbushing so as to turn freely upon the shaft. This sleeve ismounted within the bearing 5 and is provided outsideof the casing l witha coupling 9, for connecting to the driven machinery. Within the side ofthe casing the sleeve 8 carries a gear heel l0.

The second or auxiliary shaft Il is carried in bearings within thecasing l and has gears l2, I3, I4, connected thereto so as to rotatetherewith. T hree gears are shown in the drawing, but the number may beincreased or diminished as desired. One of these gears ]2 is arranged toalways be in mesh with. the gear IO on the first shaft 2.

Upon the sleeve 6 is carried a spool I5 having a groove 16 forattachment of the fork or other means for sliding it upon the sleeve G.A feather 1G:L (four in number) carried by the sleeve 6, insures thatthe sleeves will always rotate together, and at the same time permitsthe sleeve l5 to be slid along the sleeve 6. Also carried by the spoolare gears 17 and I8. These gears are of such size that they willintermesh respectively with the gear wheels I4 and I3, upon the spool`I5 being slid along the sleeve 6. The gear I8 carries a portion of thejaw members 19 of a jaw clutch, the other members 20 being carried bythe gear I0. This clutch willbe locked upon the spool I5 being moved tothe extreme right of the figure. The structure already ldescribedconstitutes a form of sliding gear speed changing transmissionmechanism. This form of change speed gearing is well known, and is verysatisfactory in operation.

The sleeve 6 is provided with a iange 20 to which is bolted the frictionclutch indicated generally by the character 2l. This friction clutchcomprises a cylindrical body 22 having an internal annular face 23.This-body is secured to the flange 20 by means of bolts 24. Inconnection with the body 22 is a second body 25, preferably of lessdiameter than the body 22, and secured to the shaft 2. The mode ofsecuring is preferably by means of a key 26. The body 25 has a reducedportion 27. Surrounding this reduced portion isa ring 28. The ring isnot continuous but a space is left open between its ends, see Fig. 2, topermit the introduction of the expanding mechanism. The ends of the ring28 are provided with semi-circular recesses which engage with similarshaped projections carried by the levers 29. The opposite faces of thelevers are provided with hard metal bearing blocks 3l which Vexpandingmechanism and rotary movement of the ring 28 will be prevented. The body25 being secured to the shaft 2y will form a 4coup-ling with the sleeve6. The levers 29 are separated by means of-n Wedge 33- carried by thesleeve 34 having a groove 35 for attacl1 ment of a fork or other meansfor moving it. This sleeve 34 is rotated with the shaft. 2 by means of asnt able feather, which may be an extension of the key 26. Upon thesleeve 34 being moved toward the body of the clutch the Wedge 33entering between the free ends of the levers 29 will separate them andthe ring 28 will be thereby expanded engaging with the outward annularsurface 23 of the body 22, thus coupling the parte of the clutchtogether.

The clutch 21 is located within the casing 1 preferably inan extension36 connected thereto. This extension is preferably formed integrallywith the rest of the Walls of the casing l'. The end Wall of theextension carries` the bearing forl the shaft 2. By prov vidng theextension merely sufficiently large for the reception of the clutch, theweight of the structure is reduced and itsbulk correspondingly reduced.

Having thus described my invention what I claim and desire to secure byLetters Patent, is:-

In a change speed gearing, the combination of a casing, a transmissiongearing of the sliding gear `type within the casing, a body having anannular internal face, secured to the transmission gearing andsurrounding the main shaft of the transmission gearing, a second bodyconnected to the shaft, und levers on the second body, an expanding ringbetween the two bodies, and adapted to engage with the annular' face,and a sleeve sliding upon the shaft, and carrying :1 wedge, locatedbetween the levers, for separating them, and expanding the ring, all ofthese parts being contained within the easing.

This specification signed and witnessed this tenth day of April, 1905.

WILLIAM M. POWER.

Witnesses:

LnoNAnn H. Dynix, JNO. Ro'r. TAYLOR.

